Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97b637335940e62…

MALICIOUS

PDF

39.1 KB Created: 2021-06-11 04:09:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ad010a5bd5ddfc69cc655ad598903ba7 SHA-1: 06ddeb29209959d026505704cb0a55118db00630 SHA-256: a97b637335940e62d04e85bbeba3c354b90c541d8a5a0d780a84c182b7deb0fe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9459

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/how-do-you-hack-roblox-game-hack PDF link annotation
    • https://www.stmik-time.ac.id/perpustakaan/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://stmik-time.ac.id/perpustakaan/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CBC 24652 bytes
SHA-256: ebbcff7055ece1ac0ed76efb5795e30052bf67dedf5301ddb7b6dd821949ec70
font_01_sfnt_off0000754f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 18816 bytes
SHA-256: d27b94fe1a8c05d6feb56d9a091a96145976f0feb7173cb46f16c8470fe3a7d8

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